microtime

microtime

Return current Unix timestamp with microseconds

 **microtime** bool $as_float

returns the current Unix timestamp with

microseconds. This function is only available on operating systems that support the gettimeofday() system call. microtime

For performance measurements, using is recommended. hrtime

as_float If used and set to true, will return a instead of a , as described in the return values section below. microtime``float``string

By default, returns a in the form "msec sec", where is the number of seconds since the Unix epoch (0:00:00 January 1,1970 GMT), and
measures microseconds that have elapsed since
and is also expressed in seconds as a decimal fraction. microtime``string``sec``msec``sec

If is set to true, then returns a , which represents the current time in seconds since the Unix epoch accurate to the nearest microsecond. as_float``microtime``float

Voorbeeld: Timing script execution

<?php
$time_start = microtime(true);

// Sleep for a while
usleep(10_000);

$time_end = microtime(true);
$time = $time_end - $time_start;

print "Did nothing in $time seconds\n";

**Voorbeeld: and **

<?php
// Randomize sleeping time
usleep(random_int(10_000, 1_000_000));

// REQUEST_TIME_FLOAT is available in the $_SERVER superglobal array.
// It contains the timestamp of the start of the request with microsecond precision.
$time = microtime(true) - $_SERVER["REQUEST_TIME_FLOAT"];

echo "Did nothing in $time seconds\n";

time``hrtime